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The Signet 3719 pH/ORP Wet-Tap allows installation and removal of pH or 
ORP electrodes without the need for process shutdown during routine electrode 
maintenance and calibration. Process isolation is achieved with a double O-ring 
seal on a unique and compact retraction assembly; no separate valve is required. 
A cam-activated automatic locking mechanism, SafeLoc™, and the short stroke 
design help to assure operator safety.

English

WARNING!

If used in conditions that exceed recommended 
pressure ratings, this product can pose a serious 
hazard.
We urge customers to read the speci

fi

 cations 

carefully before installing and operating this product.
Improper use can cause components and process 
liquids to be expelled at high speeds and cause 
serious personal injury.

*3-3719.090*

3-3719.090    Rev. P   06/17

Signet 3719 pH/ORP Wet-Tap

Description

Table of Contents

Operating Instructions

• 

English

• 

Deutsch

• 

Français

• 

Español

Warranty Information ......................................................... 2
Product Registration .......................................................... 2
Safety Information ............................................................. 2
Dimensions ........................................................................ 2
Speci

fi

 cations .................................................................... 3

System Overview............................................................... 3
Installation ......................................................................3-5
 

Location, Orientation and Required Clearance

 ............3-4

 

For pipe sizes 2.5 to 12 in. .......................................... 4

 

For pipe sizes less than 2.5 in. .................................... 4

 

Wet-Tap into Fitting...................................................... 5

 Electrode 

Installation 

................................................... 5

Electrode Removal ............................................................ 6
Electrode Maintenance ...................................................... 6
Troubleshooting ................................................................. 7
Ordering Information.......................................................... 8

Summary of Contents for Signet 8850-3

Page 1: ...urge customers to read the specifications carefully before installing and operating this product Improper use can cause components and process liquids to be expelled at high speeds and cause serious...

Page 2: ...warranted out of box but not warranted against any damage due to process or application failures e g high temperature chemical poisoning dry out or mishandling e g broken glass damaged membrane freezi...

Page 3: ...c pH Electrode 2756 WT 1 DryLoc pH Electrode 2756 WTP DryLoc plastic pH electrode 2756 WTP 1 DryLoc plastic pH electrode 2757 WT DryLoc ORP Electrode 2757 WTP DryLoc plastic ORP electrode Shipping Wei...

Page 4: ...pe sizes below 2 5 inches by creating a flow cell with standard piping components One simple solution using a tee fitting and reducer bushings is shown in the example below Many similar configurations...

Page 5: ...operation Use an appropriate thread sealant to prevent leaks The piping system can now be safely pressurized Inspect the installation for leaks 3 4 The electrode piston is locked in position by SS lo...

Page 6: ...iate solvent that does not attack the materials of construction ORP electrode surface platinum can be gently sanded with 600 grit wet and dry silicone or carbide sandpaper jewelers rouge crocus cloth...

Page 7: ...0 06 0 0 06 0 12 0 18 0 24 0 3 55 0 45 0 36 0 27 0 18 0 09 0 0 09 0 18 0 27 0 36 0 45 4 pH w Quinhydrone 7 pH w Quinhydrone Temp 20 C 25 C 30 C 20 C 25 C 30 C ORP 268 mV 263 mV 258 mV 92 mV 86 mV 79...

Page 8: ...de pH DryLoc plastic bulb 3 K wet tap 3 2757 WT 159 000 835 Electrode ORP DryLoc bulb 10 K ID wet tap 3 2757 WTP 159 001 391 Electrode ORP DryLoc plastic bulb 10 K ID wet tap 3 2750 1 159 000 744 In l...

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